Measuring attachment for sewing machines



s. c. COPOLL. v MEASURING ATTACHMENT FOR SEWING MACHINES.

APPLICATION FILED JUNE 27. I921.

Patented Aug. 29, 1922.

2 SHEETSSHEET l.

s. c. COPOLL. MEASURING ATTACHMENT FOR'SEWING MACH INES.

\ APPLICATION FILED JUNE 27,192]. V

Patented A11 29; I922.

I l-lll llll m i=5! To all whom it May concern:

UNITED STATES PATENT, OFFICE.

STEVEN C. COPOLL, OF L' OS ANGELES, CALIFORNIA.

MEASURING ATTACHMENT FOR SEWING MACHINES.

Be it known that I STEVEN C. COPOLL, a citizen'of the United statesresiding at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Measuring Attachments for Sewing Machines, of which the following is a specification.

This invention relates generally to sewing machines, and more particularly to a device that is adapted to be attached'to hemstitch machines, and which will be effective in accurately measuring the lineal amount of hemstitching done by the machine.

The principal objects of my invention are to provide a relatively simple and practical and compact 'measuring device that is capa ble of being, readily applied to hemstitch machines, to provide a measuring device that requires but. very little power in its operation, to provide a device of the character deand further to provide a device that'is very effective in performing its intended funchone. 7

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts that willbe hereinafter more fully described and claimed and illustrated in the accompanying drawings, in which Figure 1 is a side elevational view of a measuring attachment of my improved construction, the same being shown in operativeposition .on the side of a hemstitch machine.

Fig. 2 is an enlarged horizontal section ftaken'an the line 22 of Fig. I.

Fig. 3flis a plan View of my improved measuring attachment in position upon a hemstitch machine and with attachment in horizontal section. v

In the drawings I have illustrated my improved attachment in position upon any standard hemstitch machine such as that shown in Patent No. 893,372, issued June 30, 1908, said machine including'the usual head or frame 10, needle vibrating levers 11,

- rocker arm 12 ,that is utilized for imparting vibratory movement to the needle vibrating levers, said rocker arm being pivotally mounted at 13 to the head or frame 10, and the rocker arm actuating cam 14 which latter iscontained within a suitable housing 15 goods passed through the.'machine.

parts of said Specification of Letters Patent. Patented Aug. 29, 1922 Application filed tune 27,

1921. Serial No. 480,877.

that is arranged on the side of the head or frame 10.

My improved measuring device "*ludes a plate l6 that is secured by a scre.., such as 17, on the side of the head of-frame 10 immediately adjacent to and over thecani housing15, and mounted on the right hand of said plate is an ordinary counting device 1.8 preferably of the type employing a plurality of discs bearing numerals on their that is seated in plate 16 is a ratchet'wheel 21. The number of teeth I thereon corresponding with the number of hemstitch openings that are produced in each inchi of *or instance, if the machine produces eight hemstitch openings on each lineal inch of goods, then ratchet wheel 21 is provided with eight teeth, as shown in Fig. 1. a, i

Pivotally mountedfon the lower end of rocker arm '12 is one end of a spring pressed arm 22, the free end of which is formed into a hook 23 that is adapted to engage the teeth of ratchet wheel 21. Seated in plate 16 between the counting device 18 and the pin or Stud 20 isa pin or stud 24:, and journaled thereon is a disc 25 having formed in its periphery.thirty-six teeth. Projecting outwardly from the face of' ratchet wheel 21 is a pin 26 that is adapted to engage between the teeth on the edge of disc 25, and

projecting laterally from the face of disc25 and beneath the teeth on the edge thereof is a pin or finger 27 that is adapted to engage the free end of the lever 19 of the counting device 18.

' The parts just described are arrangedso that witheach complete rotation of ratchet Wheel 21 the pin 26 projecting from the outer face thereof will engage between the teeth of disc 25 and move the same one thirty-sixth of a completey revolution, and with each complete revol ion of said disc 25, pin 27 will engage'an actuate lever 19 so that the unit disc of counting device 18 plete revolution.

In the operation of the hemstitching machine, needle vibrating cam 1t actuates rocker arm 12 so as to rock or vibrate the same upon its axis 13 and consequently imparting vibratory movement to the needle vibrating levers 11, and during such opera tions the point of hook 23 moves baclzwardly and forwardly uon the face of one of the teeth of ratchet ii he'el 21 without imparting movement thereto.

At the completion of one of the small. hemstitched openings in 'the goods, the latter is shifted the distance of one opening, at which time the cam 14 moves the lower end of rocker arm laterally a sufiicient distance to cause hook 23 to rotate ratchet wheel 21 one-eighth of a complete revolution. These operations are successively repeated with each opening in the goods that are hemstitched until ratchet wheel 21 has made a complete revolution, whereupon pin 26 will engage between the teeth of disc 25 to move the same one thirty-sixth of a complete revolution, thus measuring eight hemstitched openings or one inch of work. As disc 25 makes one complete revolution, tinger 26 engages the free end of lever 19 and consequently imparting movement to the unit disc of the counter and thereby moving the same to indicate one yard of work done.

Ratchet wheel 21 is readily removable from theplate 16 in order that it may be readily detached and replaced by a wheel having a different number of teeth, it being understood that the number of teeth of the ratchet wheel that is applied for use corresponds with the number of hemstitched openings in each inch of work done by the machine, and in order to prevent said ratchet wheel from rotating too freely, a friction disc, such as 20", is positioned between the head of pin or stud 20 and the outer surface of said ratchet wheel.

A measuring attachment of my improved construction is comparatively simple, is very positive and accurate in operation, requires very little power in its operation, may be readily attached to a hemstitch machine and is effective in accurately measuring and indicating all work done by the machine.

- It will be readily understood that minor changes ll1 SlZe, l Ol'II1 and construction of the various parts of my improved attachment for hemstitch machines may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

I claim as m invention:

1. A measurlng attachment for hemstitc'h machines comprising a counting device havmamming an operating arm, a toothed disc arranged lor operation adjacent to said counting device, a finger projecting from said toothed disc for engaging the arm of the counting device, a ratchet wheel mounted for operation adjacent to the toothed disc and adapted to be intermittently rotated by operating parts of the sewing machine to which the device is applied, and means on said ratchet wheel for imparting step by step rotary motion to said toothed disc.

2. A measuring attachment for hemstitch machines comprising a counting device having an operating arm, a toothed disc arranged for operation adjacent to said countinc device, a finger projecting from said toothed disc for engaging the arm of the counting device, a ratchet wheel mounted for operation adjacent to the toothed disc and adapted to be intermittently rotated by operating parts of the sewing machine to which the device is applied, means on said ratchet wheel for imparting step by step rotarymotion to said toothed disc, and friction means for controlling the rotation of said ratchet wheel,

3. In a hemstitching machine including a rocker arm, a cam for vibrating the rocker arm and laterally shifting one end of the latter at intervals, counting mechanism, and means operable by the lateral movement of the rocker arm for actuating the counting mechanism.

4. In a hcmstitching machine, including a rocker arm, a cam for vibrating the rocker arm and laterally shifting one end of the latter at intervals, counting mechanism, and means operable by the lateral movement of the rocker arm For actuating the counting mechanism. said means including a ratchet wheel, and a pawl carried by the rocker arm and associated with the ratchet wheel in such manner that it is actuated to rotate the ratchet wheel only when the rocker arm is shifted laterally.

5. A measuring: attachment for hemstitching machines comprising a counting mechanism, and means for actuating the counting mechanism which is adapted for operation by and only when the rocker arm of a machine is laterally shifted.

6. A measuring attachment for hemstitching machines comprising a counting mechanism, and means for actuating the counting mechanism comprising a ratchet and a pawl associated with the ratchet so as to.ad- Vance the latter only at the end of a hemstitch.

In testimony whereof I have signed my name to this specification.

STEVEN C. COPOLL. 

